Littlechild, S.C..
Elements of Telecommunications Economics / Littlechild S.C.. - Stevenage, Herts : Peregrinus, 1979. - XIII, 268 s.; 25 cm.
Elements of Telecommunications Economics / Littlechild S.C.. - Stevenage, Herts : Peregrinus, 1979. - XIII, 268 s.; 25 cm.